Cats are curious animals. When they see something moving, they instinctively jump, grab, grab and let go. Cats are different from people. When doing these actions, they will inevitably use their claws and teeth, which will hurt and bleed the mice invisibly. The cat knows that the mouse can eat when it tastes blood, and will take the initiative to catch the mouse to eat in the future.

Nowadays, pet cats are not short of food, and the taste of cat food is getting better and better, so pet cats basically don't like to catch mice. Even if you accidentally get the smell of blood, it doesn't taste better than cat food, so don't eat mice. Many times, they just play for a while and then let it go.